Welcome to the Winobloggers webpage! Students and professors from different universities meet to discuss their findings on Winogradsky columns they constructed!
We learn how to formulate hypotheses, observe, comment, ask and reply to questions related to our scientific experiments.

Winogradksy columns

'In the field of observation, chance only favors the prepared mind' Pasteur 1854

Blog posts

Wednesday, 2 November 2016

Winogradsky column

UNIVERSITY OF IOANNINA GREECE
BIOLOGICAL APLICATIONS AND TECHNOLOGY

COURSE: AQUATIC MICROORGANISMS

Team 9: Katerina Mironaki
Levidiotis Charalampos

Greetings everyone,In this particular experiment we will try to identify the observable differences between the two columns we constructed. Note that the columns were constructed as indicated. A bottle(1,5L) is divided in three equally sized layers: the bottom layer consists of mud mixed with nutritious ingredients, the middle layer solely of mud and the top layer contains water taken from the lake. The ingredients we used were small shredded pieces of newspaper and a whole egg as sources of carbon, sulfur and calcium. The difference between our columns is that the second one contains double the amount of paper and eggs. No other conditions differ.The construction of the columns and the sampling took place in Lake Vrelli of Ioannina on 21/6/2016 at around 01:00 pm. The columns were later placed in the laboratory of the University. The results we expect to gather in the course of the semester include a discernable growth spurt of microbes in the second column much sooner than the first one as well a more intense coloration of the column.

Below you can see photos of the two columns about one week after their construction:

Well, to be honest the only answer we came up with is that the excessive sulfur in the column turned the water black, since it is the one that contains two eggs. Any other suggestions would be welcomed!